Metsulfuron-methyl avaliation in the control of weeds in an área of pasture seed production

Abstract

An experiment was conducted at the Bom Futuro Farm, Rondonópolis, MT during 1999/2000 in a sandy soil, to determine the effects of metsulfuron-methyl on postemergence control of weeds in a field of Brachiaria brizantha seed production. Treatments were: metsulfuron-methyl at 3.0 glha and at 3.6 glha in one application or in two applications, 2,4-D at 288 glha (as a reference) and a check. Tridax procumbens, Spemacoce latifolia, Chamaesyce hirta were controlled by metsulfuron-methyl at 3.0 and 3.6 glha in a sole application. It was observed slight injury-to B. brizantha caused by the treatrnent with two applications of metsulfuron-methyl and by 2,4-D. B. brizantha seed production, weigth of 100 panic\es were ligher in the treatments with herbicides.